Screen size
C20 Pro1.8"
U1Winner: 1.9"+6.2%
Quick verdict
U1 leads the measured specs 5-3.
Measured wins
C20 Pro
3
spec wins
Ties
4
equal specs
U1
5
spec wins
Overall winner
Screen size
Technology
C20 Pro
No cellular connectivity
U1
No cellular connectivity
2G bands
C20 Pro
N/A
U1
N/A
3G bands
C20 Pro
N/A
U1
N/A
4G bands
C20 Pro
N/A
U1
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
N/A
Speed
C20 Pro
No
U1
No
GPRS
C20 Pro
No
U1
No
EDGE
C20 Pro
No
U1
No
Announced
C20 Pro
2023, November
U1
2025, February
Status
C20 Pro
Available. Released 2023, November
U1
Available. Released 2025, February
Dimensions
C20 Pro
54 x 43 x 12.9 mm (2.13 x 1.69 x 0.51 in)
U1
49.8 x 42.4 x 11.4 mm (1.96 x 1.67 x 0.45 in)
Weight
C20 Pro
-
U1
43.8 g (1.55 oz)
SIM
C20 Pro
No
U1
No
Other
C20 Pro
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
U1
Waterproof (1ATM)
Type
C20 Pro
TFT LCD
U1
TFT LCD
Size
C20 Pro
1.81 inches
U1
1.93 inches
Resolution
C20 Pro
240 x 286 pixels (~206 ppi density)
U1
240 x 288 pixels (~194 ppi density)
OS
C20 Pro
Proprietary OS
U1
Proprietary OS
Card slot
C20 Pro
No
U1
No
Internal
C20 Pro
128MB
U1
16MB
Other
C20 Pro
No
U1
No
Loudspeaker
C20 Pro
No
U1
Yes
3.5mm jack
C20 Pro
No
U1
No
WLAN
C20 Pro
No
U1
No
Bluetooth
C20 Pro
5.0, A2DP
U1
5.4, A2DP, LE
Positioning
C20 Pro
No
U1
No
NFC
C20 Pro
No
U1
No
Radio
C20 Pro
No
U1
No
USB
C20 Pro
No
U1
No
Sensors
C20 Pro
Accelerometer, heart rate, SpO2, blood pressure
U1
Accelerometer, gyro, heart rate, SpO2
Type
C20 Pro
380 mAh
U1
300 mAh
Colors
C20 Pro
Gray, Orange
U1
Black, Pink
Price
C20 Pro
About 50 EUR
U1
-